You may need planning permission if you are planning a larger extension. All extensions will need building regulations approval. An architect can assist with this and if planning permission is required. A reputable contractor will also be able to advise you if this is needed as well.
Crymych
Crymych is a town of around 800 inhabitants and also a community (population 1,739) in the northeast of Pembrokeshire, Wales. It is located roughly 800 feet (240 m) above sea level at the eastern end of the Preseli Mountains. It stands astride the old Tenby to Cardigan turnpike road, currently the A478. The village developed around the previous Crymmych Arms railway station on the now-closed Whitland to Cardigan Railway, nicknamed Cardi Bach (Little Cardi). Crymych, which is twinned with Plomelin in Brittany, has actually a chosen community council. The village has actually provided its name to an electoral ward of Pembrokeshire that encompasses the villages of Crymych itself as well as Eglwyswrw.